A 1-year-old girl is brought to the clinic with a 3-day history of high fever (up to 39.5°C). The mother reports that the fever abruptly resolved this morning, but she noticed a pink, maculopapular rash on the child’s chest and back. The child is playful and alert with no respiratory or gastrointestinal symptoms. On examination, the rash is blanching and non-pruritic, primarily affecting the trunk and spreading to the neck and arms. Question: Which of the following viruses is most likely responsible for this condition?
